System and method for improving the exploitation of a wellbore
AssigneeInvisensing.Io
InventorFeng Yang
Life of this patent
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Abstract
A method (1000) of improving the operation of a wellbore (1), said wellbore (1) including a drill pipe (2) in which a fluid (3) circulates and an optical fiber (5) positioned outside the drill pipe (2). The circulation of said fluid (3) is controlled at least in part by an outlet valve (4a) and/or an injection valve (4b). The method includes steps of generating (100) two digital orthogonal backscatter signals from at least one light signal, preferably polarized, injected into said optical fiber (5), and controlling (400) the opening of injection and/or outlet valves (4) depending on the two digital orthogonal backscatter signals.
Claims18
A method of improving operation of a wellbore, said wellbore including a drill pipe in which a fluid circulates and an optical fiber positioned outside the drill pipe, the circulation of said fluid being controlled at least in part by at least one of an outlet valve or an injection valve, said method including the steps of:
- generating two digital orthogonal backscatter signals from at least one light signal injected into said optical fiber,
- calculating values of fluid circulation parameters, including an optical signal intensity ratio as a function of distance, from the two digital orthogonal backscatter signals, and
- controlling opening of at least one of said at least one outlet valve or injection valve depending on distributed pressure values calculated from the two digital orthogonal backscatter signals, and on said fluid circulation parameters.
A device for improving operation of a wellbore, said wellbore comprising a drill pipe in which a fluid circulates and an optical fiber positioned outside the drill pipe, said device for improving the operation of a wellbore being coupled to at least one outlet valve or injection valve, wherein the circulation of said fluid is controllable at least in part by said at least one outlet valve or injection valve, said device for improving the operation of a wellbore further comprising:
- an optical device configured to generate two digital orthogonal backscatter signals from a light signal injected into said optical fiber, and
- a processing device configured to generate, from distributed pressure values and fluid circulation parameters including an optical signal intensity ratio as a function of distance calculated from the two digital orthogonal backscatter signals, opening control data of the outlet valve or of the injection valve to control opening of the outlet valve or the injection valve.
Dependencies are inferred from the claim text.